import {v4 as uuidv4} from 'uuid';

//要随机生成一个字符串,且每次执行不能发生变化,游客身份持久存储
export const getUUID = () => {
    //先从本地存储获取uuid,
    let uuid_token = localStorage.getItem('UUIDTOKEN');
    //如果没有就生成
    if (!uuid_token) {
        //生成游客临时身份
        uuid_token = uuidv4();
        //本地存储一次
        localStorage.setItem('UUIDTOKEN',uuid_token)
    }
    return uuid_token;
}